急求结合单片机STC89C52，HC-SR04超声波传感器，LCD1602的超声波测距代码

发布网友 发布时间：2022-10-12 18:19

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热心网友 时间：2023-10-23 19:05

这个是主函数的

1602.h的内容如下：

#include"intrins.h"
#define uchar unsigned char
#define uint  unsigned int

sbit E=P2^7;  
sbit RW=P2^6;
sbit RS=P2^5;  

void delay()
{
 uchar i=12;
 while(i--)
 {
  _nop_();
  _nop_();
  _nop_();
  _nop_();
  _nop_();
 }
 }
bit Busy(void)
{
 bit busy_flag = 0;
 RS = 0;
 RW = 1;
 E = 1;
 delay();
 busy_flag = (bit)(P0 & 0x80);
 E = 0;
 return busy_flag;
}

void wcmd(uchar del)
{
 while(Busy());
 RS = 0;
 RW = 0;
 E = 0;
 delay();
 P0 = del;
 delay();
 E = 1;
 delay();
 E = 0;
}

void wdata(uchar del)
{
 while(Busy());
 RS = 1;
 RW = 0;
 E = 0;
 delay();
 P0 = del;
    delay();
 E = 1;
 delay();
 E = 0;
}

void L1602_init(void)
{
 wcmd(0x38);
 wcmd(0x0c);
 wcmd(0x06);
 wcmd(0x01);
}

void L1602_char(uchar hang,uchar lie,char sign)
{
 uchar a;
 if(hang == 1) a = 0x80;
 if(hang == 2) a = 0xc0;
 a = a + lie - 1;
 wcmd(a);
 wdata(sign);
}

void L1602_string(uchar hang,uchar lie,uchar *p)
{
 uchar a,b=0;
 if(hang == 1) a = 0x80;
 if(hang == 2) a = 0xc0;
 a = a + lie - 1;
 while(1)
 {
  wcmd(a++);
  b++;
  if((*p == '\0')||(b==17)) break;
  wdata(*p);
  p++;
 }
}

热心网友 时间：2023-10-23 19:05